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Finding the Fourth Proportional to 709,590.12, 979,226.34 and 387,297.72

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Solution

The fourth proportional to 709,590.12, 979,226.34 and 387,297.72 is: 534,466.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,590.12 : 979,226.34 = 387,297.72 : x
  2. Step 2: Convert to fraction form
    709,590.12/979,226.34 = 387,297.72/x
  3. Step 3: Cross multiply
    709,590.12x = 979,226.34 × 387,297.72
  4. Step 4: Simplify right side
    709,590.12x = 379,252,128,845.95
  5. Step 5: Solve for x
    x = 379,252,128,845.95/709,590.12
  6. Step 6: Final answer
    x = 534,466.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.